A unique business identifier for this group.

Allows the group to be referenced from external specifications.

Indicates whether the record for the group is available for use or is merely being retained for historical purposes.

Need to be able to mark a group record as not to be used because it was created in error or is otherwise no longer available (e.g. a herd that no longer exists).

This resource is generally assumed to be active if no value is provided for the active element

Identifies the broad classification of the kind of resources the group includes.

Identifies what type of resources the group is made up of.

Group members SHALL be of the appropriate resource type (Patient for person or animal; or Practitioner, Device, Medication or Substance for the other types.).

Types of resources that are part of group.

If true, indicates that the resource refers to a specific group of real individuals. If false, the group defines a set of intended individuals.

There are use-cases for groups that define specific collections of individuals, and other groups that define "types" of intended individuals. The requirements for both kinds of groups are similar, so we use a single resource, distinguished by this flag.

Provides a specific type of resource the group includes; e.g. "cow", "syringe", etc.

This would generally be omitted for Person resources.

Kind of particular resource; e.g. cow, syringe, lake, etc.

A label assigned to the group for human identification and communication.

Used to identify the group in human communication.

A count of the number of resource instances that are part of the group.

Group size is a common defining characteristic.

Note that the quantity may be less than the number of members if some of the members are not active.

Entity responsible for defining and maintaining Group characteristics and/or registered members.

This does not strictly align with ownership of a herd or flock, but may suffice to represent that relationship in simple cases. More complex cases will require an extension.

A code that identifies the kind of trait being asserted.

Need a formal way of identifying the characteristic being described.

List of characteristics used to describe group members; e.g. gender, age, owner, location, etc.

If true, indicates the characteristic is one that is NOT held by members of the group.

Sometimes group membership is determined by characteristics not possessed.

This is labeled as "Is Modifier" because applications cannot wrongly include excluded members as included or vice versa.

The period over which the characteristic is tested; e.g. the patient had an operation during the month of June.

A reference to the entity that is a member of the group. Must be consistent with Group.type. If the entity is another group, then the type must be the same.

The period that the member was in the group, if known.

Need to track who was in a group at a particular time.

The member is in the group at this time

A flag to indicate that the member is no longer in the group, but previously may have been a member.

Sometimes you don't know when someone stopped being in a group, but not when.

Members are considered active unless explicitly specified otherwise